The Following Set of Data Was Obtained by the Method

The following set of data was obtained by the method of initial rates for the reaction:
2 HgCl₂(aq) + C₂O₄^2-(aq) → 2 Cl^-(aq) + 2 CO₂(g) + Hg₂Cl₂(s)
What is the rate law for the reaction?

A) Rate = k[HgCl₂][C₂O₄^2-]^-2
B) Rate = k[HgCl₂][C₂O₄^2-]^-1
C) Rate = k[HgCl₂]²[C₂O₄^2-]
D) Rate = k[HgCl₂][C₂O₄^2-]²